scheduling has become an attractive area for artificial intelligence researchers. on other hand, in today's real-world manufacturing systems, the importance of an efficient maintenance schedule program cannot be ignored because it plays an important role in the success of manufacturing facilities. a maintenance program may be considered as the heath care of manufacturing machines and equip...

Climate variability and farmers’ desire to improve the crop yield have resulted in an increase irrigated agriculture mid-Atlantic region. However, huge initial capital cost associated with installation operation of irrigation systems is generally prohibitive, most farmers finding difficulty justifying expenditure, uncertainty overall return on their investment. The objective this study was deve...

farm machinery managers often need to make complex economic decisions on machinery replacement. repair and maintenance costs can have significant impacts on this economic decision. the farm manager must be able to predict farm machinery repair and maintenance costs. this study aimed to identify a regression model that can adequately represent the repair and maintenance costs in terms of machine...

The purpose of this paper is using the concepts of value engineering (VE) in evaluating the improvement caused by preventive maintenance (PM) systems in construction project. A real case is used to show how we can implement the proposed method. VE is the systematic application of recognized techniques by multi-disciplined teams that identifies the function of a product or service, establishes a...

Abstract This paper addresses the questions: How to calculate cost of a start/stop cycle? running one hour outside normal operating range, e.g., on part load? The presents model for calculation individual hydropower units comprising both direct costs incurring at each cycle, and indirect because reduced rehabilitation intervals main components. fundamental assumption is that frequent start-ups ...

the conventional method towards deriving schedule for a fleet of ships to minimize cost alone has the short-coming of not addressing the problem of operation revenue losses associated with delays during maintenance at ships dockyards. in this paper, a preventive maintenance schedule for a fleet of ships that incorporates op-portunity cost is presented. the idea is to assign a penalty cost to al...

The purpose of this study was to assess the farmer's satisfaction with services delivered by Water User Associations (WUAs) and determine the factors affecting farmer's satisfaction with the WUAs. Stratified sampling was used to select 124 farmer members of WUAs in the Gotvand irrigation Scheme (GIS). A researcher-made questionnaire was employed for data collection. Its validity was confirmed b...

In today's competitive market, all manufacturers attempt to improve their maintenance policy in order to decrease the cost of failure and increase the quality of products, but most of these attempts do not consider the role of humans involved in a manufacturing system. Human resources are the main factor in manufacturing that has an undeniable effect on products quality, machines reliability, s...